The Probe,low Water Cutoff, cataloged under National Stock Number 4520-01-423-9516, is classified within Federal Supply Class 4520 (Space and Water Heating Equipment) of the Plumbing, Heating, and Waste Disposal group. The manufacturer of record is The Electric Heater Co Dba Hubbell Electric Heater Co.. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-01-423-9516 |
| Primary Part Number | 3H1B1 |
| Item Name | Probe,low Water Cutoff |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | The Electric Heater Co Dba Hubbell Electric Heater Co. |
| Status | ACTIVE |
| General Characteristics Item Description | 303 S/S; INSULATION SLEEVE IS POLYTETRAFLUOROETHYLENE 3/4" LONG; HAS HEX HEAD EXTERNALLY THREADED 0.375-18 NPT FITTING |
| Material | STEEL CORROSION RESISTING |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| VE0733020100 | Stokvis Tapes Nv (BEL) |
| 3H1B1 PRIMARY | The Electric Heater Co Dba Hubbell Electric Heater Co. (USA) |
| Reference | Meaning |
|---|---|
| 94-7323 PIECE 16 | 5/9 Secondary reference The Electric Heater Co Dba Hubbell Electric Heater Co. |
| 3H181A | 5/9 Secondary reference Warrick Controls Inc |
| 94-7323 | D/9 Drawing number reference only The Electric Heater Co Dba Hubbell Electric Heater Co. |
| 3H1B1A | 3/9 Design control — primary reference Warrick Controls Inc |
NSN 4520-01-423-9516 is a Probe,low Water Cutoff, manufactured by The Electric Heater Co Dba Hubbell Electric Heater Co., classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-423-9516 has 2 manufacturer part numbers on file: VE0733020100 (Stokvis Tapes Nv), 3H1B1 (The Electric Heater Co Dba Hubbell Electric Heater Co.).
Key specifications for 3H1B1: General Characteristics Item Description: 303 S/S; INSULATION SLEEVE IS POLYTETRAFLUOROETHYLENE 3/4" LONG; HAS HEX HEAD EXTERNALLY THREADED 0.375-18 NPT FITTING; Overall Length: 12.000 INCHES NOMINAL IN; Overall Width: 0.250 INCHES NOMINAL IN; Special Features: LOW WATER CUTOFF SINGLE ELECTRODE PROBE FOR MODEL E10-1.5SLA HUBBELL ELECTRIC WATER HEATER; PROBE IS WIRED TO LOW WATER CUTOFF. 2 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.